/*
 * R : A Computer Language for Statistical Data Analysis
 * Copyright (C) 1995, 1996  Robert Gentleman and Ross Ihaka
 * Copyright (C) 1997--2008  The R Development Core Team
 * Copyright (C) 2003, 2004  The R Foundation
 * Copyright (C) 2010 bedatadriven
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

package org.renjin.primitives.subset;

import org.renjin.sexp.AtomicVector;
import org.renjin.sexp.StringVector;

/**
 * Named subscripts select element by name, for example
 * x["foo"]
 */
public class NamedSubscript extends Subscript {
  private int count;
  private int[] indices;

  public NamedSubscript(int length, AtomicVector names, StringVector subscript) {
    indices = new int[subscript.length()];
    count = subscript.length();

    int nextNewIndex = length;

    for(int i=0;i!=subscript.length();++i) {
      int index = names.indexOf(subscript, i, 0);
      indices[i] = (index == -1) ? nextNewIndex++ : index;
    }
  }

  @Override
  public int getCount() {
    return count;
  }

  @Override
  public int getAt(int i) {
    return indices[i];
  }
}
